They are attached to the mounts but the new mounts are being bolted onto fabricated parts and are held on temporary by two bolts on each side
The mounts are from Cadre thru eBay, excellent by the way, they are off a V7III. In the first pic that shows the front of the right bag you can see the brace that ends a few inches from the right passenger peg where the original mounts attached. That’s the only place I have to modify the new mounts, the other mounting points will need some brackets.
The taillight is from a G5 or Convert, been on there thirty years. I may switch it to one from an Ambassador if spring is late… the original taillight assembly had problems with the plastic wedge shaped mount on C’s.